1143287808 has 208 divisors, whose sum is σ = 3484254816. Its totient is φ = 330301440.

The previous prime is 1143287807. The next prime is 1143287813. The reversal of 1143287808 is 8087823411.

It is a tau number, because it is divible by the number of its divisors (208).

It is a self number, because there is not a number n which added to its sum of digits gives 1143287808.

It is not an unprimeable number, because it can be changed into a prime (1143287807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2715438 + ... + 2715858.

Almost surely, 2^1143287808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143287808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1742127408).

1143287808 is an abundant number, since it is smaller than the sum of its proper divisors (2340967008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1143287808 is a wasteful number, since it uses less digits than its factorization.

1143287808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 1143287808 is about 33812.5392125466. The cubic root of 1143287808 is about 1045.6472286080.

The spelling of 1143287808 in words is "one billion, one hundred forty-three million, two hundred eighty-seven thousand, eight hundred eight".